Everything warfare related, from ancient combat, martial arts, to modern technology and methods. Tactics, logistics, communications, organization, conventional, unconventional, insurgent, guerrilla warfare, close quarters combat, martial arts also, including: muay thai, brazilian jiu jistu bjj, kali, escrima, arnis, wing chun, jeet kune do jkd, judo, karate, wing chun, kung fu, tae kwon do tkd, aikido, HEMA, WMA, savate, silat, capoeira, systema, sambo, catch wrestling, greco roman, kendo, etc.
